Method and apparatus for reproducing discontinuous AV data

Abstract

Provided is a method of sharing content to which digital rights management (DRM) is applied. In the method of sharing the content between a first device storing the content and a second device while they are connected, the first device receives a request for transmission of the content from the second device, determines whether it is connected to the second device and generates license information regarding the DRM, and transmits the license information and the content to the second device. Accordingly, content to which DRM is applied can be shared between a plurality of devices only when they are connected, thereby removing a need to redundantly purchase the DRM content and allowing the content to be conveniently shared. Also, since the content can be shared when the devices are physically connected, degradation of the quality of sound or interruptions can be minimized.

1 . A method of allowing a first device, which stores content to which digital rights management (DRM) is applied, to share the content with a second device while the first device is connected to the second device, the method comprising:
 receiving a request for transmission of the content from the second device;   determining whether the first device is connected to the second device, and generating license information regarding the DRM; and   transmitting the license information and the content.   
   
   
       2 . The method of  claim 1 , wherein the transmitting of the license information and the content comprises receiving a request for a transmission of the license information from the second device. 
   
   
       3 . The method of  claim 2 , wherein, if the request for transmission of the license information is received from the second device, the license information is continuously generated. 
   
   
       4 . The method of  claim 3 , wherein, if the first device is disconnected from the second device, the transmitting of the license information and the content is discontinued. 
   
   
       5 . The method of  claim 1 , wherein a plurality of data blocks representing the content, and temporary license information for decrypting the plurality of data blocks are transmitted to the second device. 
   
   
       6 . A method of allowing a first device, which stores content to which digital rights management (DRM) is applied, to share the content with a second device while the first device is connected to the second device, the method comprising:
 requesting the first device to transmit the content;   receiving license information regarding the DRM and the content from the first device; and   reproducing the content.   
   
   
       7 . The method of  claim 6 , wherein the content is decrypted using the license information. 
   
   
       8 . The method of  claim 7 , wherein the license information corresponding to the reproduced content is deleted. 
   
   
       9 . The method of  claim 6 , wherein the reproducing of the content comprises requesting the first device to transmit the license information. 
   
   
       10 . The method of  claim 6 , wherein a plurality of data blocks of the content, and temporary license information for decrypting the data blocks are received from the first device. 
   
   
       11 . An apparatus comprising:
 a content storage unit which stores content to which digital rights management (DRM) is applied;   a channel interface which receives a request for transmission of the content from an external device while being connected to the external device;   a license generating unit which generates license information regarding the DRM; and   a controller which determines whether the channel interface is connected to the external device, and allows the license information and the content to be transmitted to the external device via the channel interface.   
   
   
       12 . The apparatus of  claim 11 , wherein the channel interface receives a request for transmission of the license information from the external device while transmitting the license information and the content. 
   
   
       13 . The apparatus of  claim 12 , wherein the controller allows the license information to be continuously generated when receiving the request for transmission of the license information from the external device. 
   
   
       14 . The apparatus of  claim 13 , wherein, if the channel interface is disconnected from the external device, the transmission of the license information and the content is discontinued. 
   
   
       15 . A device comprising:
 a channel interface which requests an external device to transmit content to which digital rights management (DRM) is applied while being connected to the external device which stores the content, and receives license information regarding the DRM and the content from the external device;   an encrypting/decrypting unit which decrypts the content by using the license information; and   a content reproducing unit which reproduces the decrypted content.   
   
   
       16 . The device of  claim 15 , further comprising a controller which requests the external apparatus to transmit the license information during the reproduction of the decrypted content. 
   
   
       17 . The device of  claim 16 , wherein the license information corresponding to the reproduced content is deleted. 
   
   
       18 . The device of  claim 17 , wherein the encrypting/decrypting unit re-encrypts the content by using the license information. 
   
   
       19 . A content sharing system comprising:
 a first device which stores content to which digital rights management (DRM) is applied, and generates license information regarding the DRM and transmits the license information and the content when receiving a request for transmission of the content; and   a second device which requests the first device to transmit the content and reproduces the content by using the received license information while being connected to the first device.   
   
   
       20 . The content sharing system of  claim 19 , wherein, if the first device is disconnected from the second device, the transmission of the content and the license information and the reproduction of the content are discontinued. 
   
   
       21 . A computer readable medium having recorded thereon a computer program for executing the method of  claim 1 .